<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <title></title>
    <style>
        body,
        ul,
        ol,
        li,
        img {
            margin: 0;
            padding: 0;
            list-style: none;
        }
        
        #box {
            width: 490px;
            height: 270px;
            padding: 5px;
            position: relative;
            border: 1px solid #ccc;
            margin: 100px auto 0;
        }
        
        .ad {
            width: 490px;
            height: 270px;
            /*overflow: hidden;*/
            position: relative;
        }
        
        #box img {
            width: 490px;
        }
        
        .ad ol {
            position: absolute;
            right: 10px;
            bottom: 10px;
        }
        
        .ad ol li {
            width: 20px;
            height: 20px;
            line-height: 20px;
            border: 1px solid #ccc;
            text-align: center;
            background: #fff;
            float: left;
            margin-right: 10px;
            cursor: pointer;
            _display: inline;
        }
        
        .ad ol li.current {
            background: yellow;
        }
        
        .ad ul li {
            float: left;
        }
        
        .ad ul {
            position: absolute;
            top: 0;
            width: 2940px;
        }
        
        .ad ul li.current {
            display: block;
        }
        
        #arr {
            display: none;
        }
        
        #arr span {
            width: 40px;
            height: 40px;
            position: absolute;
            left: 5px;
            top: 50%;
            margin-top: -20px;
            background: #000;
            cursor: pointer;
            line-height: 40px;
            text-align: center;
            font-weight: bold;
            font-family: '黑体';
            font-size: 30px;
            color: #fff;
            opacity: 0.3;
            border: 1px solid #fff;
        }
        
        #arr #right {
            right: 5px;
            left: auto;
        }
    </style>
</head>

<body>
    <div id="box" class="all">
        <div class="ad">
            <ul id="imgs">
                <li><img src="./images/1.jpg" /></li>
                <li><img src="./images/2.jpg" /></li>
                <li><img src="./images/3.jpg" /></li>
                <li><img src="./images/4.jpg" /></li>
                <li><img src="./images/5.jpg" /></li>
            </ul>
        </div>
        <div id="arr"><span id="left">&lt;</span><span id="right">&gt;</span></div>
    </div>
</body>

</html>